Excavator.



No. 885,757. 'PATENTED APR. 218, 1908.

' 0. 0. JACOBS.

v EXGAVATOR. APPLICATION I ILBD JUNE 15,1907.

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wi l: Nfl RRls PETERS ca., WASHINGTON, n. c.

' TED APR. 2a 1908 c. c. JACOBS. T' A EXGAVATOR. APPLICATION FILED JUNE 16,1907.

4 SHEETS-SHEET 2.

G. 0. JACOBS.

V BXGAVATOR. I APPLICATION FILED JUNE 15.1907.

' Nd.885,757-. PATENTED APR.28,1908'.'

4 SHEETS-SHEET 3.

O 000 QQOO O OOOQO .rn: NORRIS PETERS ca wasnmamly, n. c.

o. 0. JACOBS. EXGAVATOR. A-EPLIOATIORIILBD JUNE 15; 1907.

PATENTED APR. 28, 1908.

4 SHEETS-SHEET 4,

UNITED STATES PATENT OFFICE.

OHARLES'G. IAcoBs, oF'cHI'cAso, ILLINOIS, ASSIGNOR TO F. c. AUSTIN DRAINAGE- EXOAVATOR COMPANY, OF CHICAGO, ILLINOIS, A QQRPORATION OF ILLINOIS.

ExoAvAToR.

Specification of Letters Patent.

Patented April 28, 1908 7 Application filed June 15, 1907. Serial No. 379,203.

' To all whom it may concern:

. cago, in the county of'Cook and Stateof Illi-' nois, have invented certain new and useful Improvements in Excavators, of which the followlng 1s a specificatlon.

My invention relates to excavators orditch digging machines, and concerns more particularly the bucketor' shovel and ,the'

means for discharging or dumping its load- I have found it advisable to have both ends of the bucket open, one end having oneor more shar cuttin edges and adapted to receive the .irt, wh' e the other or rear end is normally closed by a hood. The bucket is pivoted or hinged or, otherwise mounted so as to be movable whereby its rear open end may be moved or tilted away from the hood, which action permits the discharge of the load. Preferably the forward mouth or entrance to the bucket has a plurality of cutting edges so that when one becomes unduly lu led or unfit for further service without sharpening I may change or reverse the osition of the bucket to bring another s arp edge into action.

On the accompanying drawings, forming a part of this specification, I have illustrated two preferred and desirable embodiments of my Invention, like reference characters referring to the same parts throughout.

On these drawings Figure 1 is a side elevation of one form of my improved type of bucket and illustrates also the means for tilting the same to discharge or dump its load; Fig. 2 is a view similar to. Fig. .1 and shows the bucket or shovel in discharging position; Fig. 3 is a lan view of the bucket, its truck, a portion 0 the track-wayof the bucket, and a means for tilting the bucket; Fig. 4 is an elevation on a reduced scale of an excavator in which my improved forms of bucket are suitable for use; Fig. 5 is a side elevation of a modified form of bucket and tiltin mechanism; and Fig. 6 is a cross-section il ustrating the cooperatlon of the truck Wheel on one side of the truck with the track-way and the track and co-acting mechanism for tilting the bucket.

The buckets described below and illustrated on the drawings are each mounted on a truck adapted. to travel or reciprocate on a track-way 10 (Fig. 4) of an, excavator shaped to correspond or conform substantially to the outline or cross-sectional profile of the ditch or trench to be dug. This form of excavator is now well known in the art, but it should be understood that the track-way 10 is fed downwardly ste by step by suitable mechanism to permit the bucket to scrape ofl successive layers of dirt and convey the excavated material over the banks upon which it is dum ed. The track-way 10 consists of a track p ate 11 on each side of the bucket, each having riveted thereto top and bottom angle bars 12 and 13 which in conjunction with the plate 11 form one side of the track-way. The bucket truck adapted to travel or reciprocate on this track-way consists of a pair of side channel bars 13 suitably connected together at their forward and rear ends by the cross channel bars 14, 15, 16, and 17. As is illustrated in Figs. 1, 2, and 3 the forwardly pulling or advancing cable 18 is attached by suitable means to the channel bar 14, while the retracting cable 19 is similarly secured to the cross channel bar 17. The truck is provided with front and rear axles 20 and 21 23 is a hood 24 having a rear verticallycurved wall 25, and having depending from the channel bars 13" a air of supporting portions or cars 26 to w ich the bucket 27 is ivoted or hinged at 28. The hood 25 overaps and closes the rear open mouth or exit 28 of the bucket when the latter is in the position shown in Fig. 1, which is its normal load-retaining position. As is indicated in Fig. '2 the side walls 29 of the bucket have their, rear ends curved concentric to the pivot or hinge 28, which is the same curvature as the rear wall 25 of the hood so that the latter is permitted to completely close the discharge mouth 28. The bucket 27, as stated above, has the side walls 29 and also has a top wall 30 and a bottom 31, the forward end 32 of the bucket being open and equipped at its top and bottom edges 33 and 34 with sharp cutting edges, either or both of which may be serrated or notched as the edge 33 is shown in Fig. 3. The pivot 28 is midway between the top and bottom walls 30 and 31 of the bucket, which permits the latter to be reversed in position if desired, whereby when the cutting edge 34 has become dulled or unsuitable for further use the other edge 33 may be brought into action. This dismounting and reversal of the bucket can bereadily and easily accomplished, in fact can be more quickly done than would be required to of the bucket and extended transversely thereto sufficiently to overlap the top flanges of the truck side channels 13 I provide a bar 39 which limits the downward turning of the bucket on its hinges or pivots 28, the bucket at the same time however being permitted to tilt upwardly to ride over obstructions. Also on the top of the bucket I mount a catch 40 which cooperates with the hook 37. A standard 41 consisting of a bent plate slotted at 42 so as to escape the hook 37 is mounted on the rear central portion of the truck, the standard being adapted to cooperate with a transversely-extended plate 43 fastened to the hook 37.

The operation of this mechanism is substantially as follows: The truck and its attached bucket are reciproceated on the trackway 10 by the advancing and retracting cables 18 and 19 operated by suitable mechanism not shown in detail. During the forward travel of the bucket in the trench its lower sharp edge shaves ofi a layer of earth, the dirt being received in the bucket and retained therein because of the closure of the rear mouth 28 by the curved hood 25. When the truck and attached bucket reach the position on the track-way where the load should be dumped, the hook 37 engages the catch 40 and lifts the forward end of the bucket, tilting it upon its pivots or hinges 28. This rocking of the bucket moves its rear end 28" away from the hood 25 so that the dirt or load may drop therethrough. In this dumping operation the bucket is not quite brought to vertical position, so that if it is released it will automatically rock or tilt to the normal load-retaining position indicated in Fig. 1. To release the hook 37 from the catch 40 the standard 41 is provided, the

u per end of which strikes the plate 43 and lifts the hook sufiiciently to free the catch 40 and the bucket therefrom, the latter dropping to normal position as soon as free.

In Figs. 5 and 6 I have illustrated a modithe bucket I employ a track 44, on each side 7 of the track-way 10, which. has upper and lower angle bars 45 and 46. Journaled on the top of the bucket in bearings 47 is a transverse shaft 48 having at its opposite ends rollers 49 which cooperate with the tracks e 44, that is travel between the angle bars 45 and 46. It will be noted, as shown in Fig. 5, that the track 44 is bowed upwardly at the position where it is desired to tilt the bucket, and as the truck and its attached bucket travel up or along the track-way 10 the rollers 49 are lifted when they engage the arch angle bar 49, and by their n'lovemel'lt and cooperation with the track 44 tilt the bucket to the discharge'position shown. in Fig 5. When the truck and bucket travel rearwardly the bucket is brought to normal position by the unbowed portions of the tracks 44. This latter form of device is somewhat simpler than the other and in some respects is more preferable.

I desire to have it understood that this invention is not limited and restricted to the precise details of construction shown and described, but that these details may be varied within wide limits without departure from my invention.

I claim:

1. The combination of an excavating bucket having an open rear end, a hood or closure for said open end, and means to move said bucket so that the hood or closure no longer closes its rear open end whereby the contents may be discharged, substantially as described.

2. The combination of apivoted or hinged excavating bucket having an open rear end, a hood or closure for said open end, and means to tilt said bucket on its pivots or hinges so that the hood or closure no longer closes its rear open end whereby the contents may be discharged, substantially as described.

3. The combination of a pivoted or hinged. bucket having an open front mouth with a sharp cutting edge and an open rear end, a hood or closure for said open end, and means to tilt said bucket on its pivots or hinges so that the hood or closure no longer closes its rear open end whereby the contents may be. i.

discharged, substantially as described.

4. The combination of a truck, an excavating bucket pivoted or hinged to said truck and having an open front mouth with a sharp cutting edge and an open rear end, a hood or closure for said open end, and means to tilt said bucket on its pivots or hinges so that the hood or closure no longer closes its rear open end whereby the contents may be discharged, substantially as described.

5. The combination of a trackway shaped to conform substantially to the cross-sec tional outline of the trench to be dug; a truck adapted to travel on said' trackway, an excavating bucket pivoted or hinged to said truck and having an open front mouth with a shar cutting edge and an open rear end, a

1100 or closure for said open end, and means to tilt said bucket on its pivots or hinges so e bucket so that the hood or closure no longer closes its rear open end whereby the contents may be discharged, substantially as deseribed.

7. The combination of a trackway shaped to conform substantially to the cross-sectional profile or outline of the trench to be dug, a truck adapted to travel on said trackway, an excavating bucket hinged to said truck, said bucket having an open front end with a sharp cutting edge and an open rear end, a hood mounted on said truck and adapted normally to close the rear open end of said bucket, a track, and means cooperating with said track to tilt said bucket so that the hood support, and a bucket mounted on said sup-' port and having an open mouth with a plurality of cutting edges whereby when the active edge becomes dull the position of the bucket may be changed or reversed to render one of the other cutting edges operative, when the bucket travels in the same direction as be fore, substantially as described.

CHARLES C. JACOBS.

Witnesses: I

FREDERICK C. GooDWIN, WALTER M. FULLER. 

